This will start with the situation of Liangshan heroes at that time. First of all, Water Margin is really a treasure trove of geomantic omen. In a short time, the army of the Northern Song Dynasty may have nothing to do with Liangshan heroes, but if the Northern Song Dynasty concentrated its superior forces on encirclement and suppression, even 10 Liangshan Park could not resist the attack of the Northern Song Dynasty army. As a "traitor", it will be annihilated by the Northern Song Dynasty court sooner or later.
Because the Fang La Uprising in the south of the Yangtze River was the most powerful at that time, the main goal of the Northern Song Dynasty was not the water margin, so we can see that Liangshan heroes could repeatedly defeat Song Jun's offensive intention in the water margin. So under such favorable conditions, if Song Jiang does not accept the appeal, can he lead 108 Liangshan heroes to fight against the regular army of the Song Dynasty and finally conquer Tokyo? Obviously, this is impossible.
Because Liangshan developed very rapidly in the early stage, and because the Northern Song Dynasty didn't pay attention to them at all. If Song Jiang announced that he would lead the 108 hero to revolt, then the Northern Song Dynasty would certainly use various strategies to undermine the internal unity of Liangshan. Due to the complex internal structure of Liangshan heroes, such as Chai Jin and others, they were all upper-level vested interests. As long as the Northern Song Dynasty court made one or two moves, the originally fragmented Liangshan heroes would instantly fall apart.
Secondly, Liangshan heroes are unpopular around the water margin. As we all know, most Liangshan heroes make a living by robbing, so who will they rob? Besides the rich, they rob people's homes more. Can the people support Liangshan Uprising? It is precisely because Liangshan heroes can't unite the people, so in the end, whether it is rebellion or harness, it can only be a tragedy.